制作工具类日期管理类
该工具类主要包含一下个方法
1. String getEveryMonth(String,startDate,String endDate) 获取两个时间点的每一个月
2. String getEveryday(String,startDate,String endDate) 获取两个时间点的每一天
3. int contDay(String,startDate,String endDate) 返回两个时间点的天数
4.addoneday(String date)增加或减少一天
5.addonemonth(String data,int i) 增加或减少i个月
package util;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
public class dateUtil {
private static transient int gregorianCutoverYear = 1582;
/** 闰年中每月天数 */
private static final int[] DAYS_P_MONTH_LY= {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
/** 非闰年中每月天数 */
private static final int[] DAYS_P_MONTH_CY= {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
/** 代表数组里的年、月、日 */
private static final int Y = 0, M = 1, D = 2;
/**
* 将代表日期的字符串分割为代表年月日的整形数组
* @param date
* @return
*/
public static int[] splitYMD(String date){
date = date.replace("-", "");
int[] ymd = {0, 0, 0};
ymd[Y] = Integer.parseInt(date.substring(0, 4));
ymd[M] = Integer.parseInt(date.substring(4, 6));
ymd[D] = Integer.parseInt(date.substring(6, 8));
return ymd;
}
/**
* 检查传入的参数代表的年份是否为闰年
* @param year
* @return
*/
public static boolean isLeapYear(int year) {
return year >= gregorianCutoverYear ?
((year%4 == 0) && ((year%100 != 0) || (year%400 == 0))) : (year%4 == 0);
}
/**
* 日期加1天
* @param year
* @param month
* @param day
* @return
*/
private static int[] addOneDay(int year, int month, int day){
if(isLeapYear( year )){
day++;
if( day > DAYS_P_MONTH_LY[month -1 ] ){
month++;
if(month > 12){
year++;
month = 1;
}
day = 1;
}
}else{
day++;
if( day > DAYS_P_MONTH_CY[month -1 ] ){
month++;
if(month > 12){
year++;
month = 1;
}
day = 1;
}
}
int[] ymd = {year, month, day};
return ymd;
}
/**
* 将不足两位的月份或日期补足为两位
* @param decimal
* @return
*/
public static String formatMonthDay(int decimal){
DecimalFormat df = new DecimalFormat("00");
return df.format( decimal );
}
/**
* 将不足四位的年份补足为四位
* @param decimal
* @return
*/
public static String formatYear(int decimal){
DecimalFormat df = new DecimalFormat("0000");
return df.format( decimal );
}
/**
* 计算两个日期之间相隔的天数
* @param begin
* @param end
* @return
* @throws ParseException
*/
public static long countDay(String begin,String end){
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Date beginDate , endDate;
long day = 0;
try {
beginDate= format.parse(begin);
endDate= format.parse(end);
day=(endDate.getTime()-beginDate.getTime())/(24*60*60*1000);
} catch (ParseException e) {
e.printStackTrace();
}
return day;
}
/**
* 以循环的方式计算日期
* @param beginDate endDate
* @param days
* @return
*/
public static List<String> getEveryday(String beginDate , String endDate){
long days = countDay(beginDate, endDate);
int[] ymd = splitYMD( beginDate );
List<String> everyDays = new ArrayList<String>();
everyDays.add(beginDate);
for(int i = 0; i < days; i++){
ymd = addOneDay(ymd[Y], ymd[M], ymd[D]);
everyDays.add(formatYear(ymd[Y])+"-"+formatMonthDay(ymd[M])+"-"+formatMonthDay(ymd[D]));
}
return everyDays;
}
public static List<String> getEveryMonth(String begintime,String endtime) throws ParseException{
List<String> results = new ArrayList<String>();
SimpleDateFormat format1= new SimpleDateFormat("yyyy-MM-dd");
SimpleDateFormat format2= new SimpleDateFormat("yyyy-MM");
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
if(begintime.length()>7){
c1.setTime(format1.parse(begintime));//2014-02-24
}else{
c1.setTime(format2.parse(begintime));//2014-02-24
}
if(endtime.length()>7){
c2.setTime(format1.parse(endtime));//2015-04-30
}else{
c2.setTime(format2.parse(endtime));//2015-04-30
}
c2.add(Calendar.MONTH, 1);
loop1: for (; c1.get(Calendar.YEAR) <=c2.get(Calendar.YEAR); c1.add(Calendar.YEAR, 1)) {
loop4:if(c1.get(Calendar.YEAR)==c2.get(Calendar.YEAR)){
for(;c1.get(Calendar.MONTH)<=c2.get(Calendar.MONTH);c1.add(Calendar.MONTH, 1)){
if((c1.get(Calendar.MONTH)+1)<10){
results.add(c1.get(Calendar.YEAR)+"-0"+(c1.get(Calendar.MONTH)+1));
}else{
results.add(c1.get(Calendar.YEAR)+"-"+(c1.get(Calendar.MONTH)+1));
}
if(c1.get(Calendar.MONTH)==11){
results.add(c1.get(Calendar.YEAR)+"-"+(c1.get(Calendar.MONTH)+1));
break loop1;
}
}
}else{
for(;c1.get(Calendar.MONTH)<=11;c1.add(Calendar.MONTH, 1)){
if(c1.get(Calendar.MONTH)==11){
results.add(c1.get(Calendar.YEAR)+"-"+(c1.get(Calendar.MONTH)+1));
c1.set(Calendar.MONTH, 0);
break loop4;
}else{
if((c1.get(Calendar.MONTH)+1)<10){
results.add(c1.get(Calendar.YEAR)+"-0"+(c1.get(Calendar.MONTH)+1));
}else{
results.add(c1.get(Calendar.YEAR)+"-"+(c1.get(Calendar.MONTH)+1));
}
}
}
}
}
return results;
}
public static String addoneday(String beginDate){
int[] ymd = splitYMD( beginDate );
ymd = addOneDay(ymd[Y], ymd[M], ymd[D]);
return formatYear(ymd[Y])+"-"+formatMonthDay(ymd[M])+"-"+formatMonthDay(ymd[D]);
}
public static String addonemonth(String date,int i) throws ParseException {
SimpleDateFormat format= new SimpleDateFormat("yyyy-MM");
Calendar c = Calendar.getInstance();
c.setTime(format.parse(date));
c.add(Calendar.MONTH, i);
if(c.get(Calendar.MONTH)+1<10) {
return c.get(Calendar.YEAR)+"-0"+(c.get(Calendar.MONTH)+1);
}else {
return c.get(Calendar.YEAR)+"-"+(c.get(Calendar.MONTH)+1);
}
}
public static int getMonth(String date) throws ParseException {
SimpleDateFormat format= new SimpleDateFormat("yyyy-MM");
Calendar c = Calendar.getInstance();
c.setTime(format.parse(date));
return c.get(Calendar.MONTH)+1;
}
public static int getYear(String date) throws ParseException {
SimpleDateFormat format= new SimpleDateFormat("yyyy-MM");
Calendar c = Calendar.getInstance();
c.setTime(format.parse(date));
return c.get(Calendar.YEAR);
}
public static boolean compaire(String date1,String date2) throws ParseException{
SimpleDateFormat format= new SimpleDateFormat("yyyy-MM");
Date c1 = format.parse(date1);
Date c2 = format.parse(date2);
return c1.before(c2);
}
public static void main(String[] args) throws ParseException {
System.out.println(dateUtil.getEveryMonth("2017-9", "2017-10"));
}
}